A Bethesda doctor must pay the government more than $17 million in fines for allegedly submitting false Medicare and Medicaid claims and double-billing for nuclear stress test studies. On Tuesday, the U.S. District Court for the District of Columbia entered judgement for the money against Dr. Ishtiaq Malik, a nuclear cardiologist who practices in D.C. The federal government says Malik double-billed for the nuclear stress tests by categorizing the stress and rest phases, which can be conducted over multiple days, as two separate tests. The test must be coded and submitted as one test.